Dynamic updating recent menu for tabs from other devices.

chrome/browser/ui/toolbar/app_menu_model.cc

Index: chrome/browser/ui/toolbar/app_menu_model.cc
diff --git a/chrome/browser/ui/toolbar/app_menu_model.cc b/chrome/browser/ui/toolbar/app_menu_model.cc
index 7c6bd9250cb1d280b38cff0b57b0eccffad3279a..7dd6c98e868e2ba38a191bce55ab7e626ac6a5aa 100644
--- a/chrome/browser/ui/toolbar/app_menu_model.cc
+++ b/chrome/browser/ui/toolbar/app_menu_model.cc
@@ -717,9 +717,8 @@ void AppMenuModel::Build() {
   AddSeparator(ui::NORMAL_SEPARATOR);
 
   if (!browser_->profile()->IsOffTheRecord()) {
-    recent_tabs_sub_menu_model_.reset(new RecentTabsSubMenuModel(provider_,
-                                                                 browser_,
-                                                                 NULL));
+    recent_tabs_sub_menu_model_.reset(
+        new RecentTabsSubMenuModel(provider_, browser_));

[Peter Kasting, 2017/03/23 04:48:34]

Nit: While here, prefer MakeUnique to bare new:

    recent_tabs_sub_menu_model_ =
        base::MakeUnique<RecentTabsSubMenuModel>(provider_, browser_);

     AddSubMenuWithStringId(IDC_RECENT_TABS_MENU, IDS_HISTORY_MENU,
                            recent_tabs_sub_menu_model_.get());
   }